Abstract
This note presents a method of public key distribution using quantum communication of n photons that simultaneously provides a high probability that the bits have not been tampered. It is a variant of the quantum method of Bennett and Brassard (BB84) where the transmission states have been decreased from 4 to 3 and the detector states have been increased from 2 to 3. Under certain assumptions regarding method of attack, it provides superior performance (in terms of the number of usable key bits) for n<18m, where m is the number of key bits used to verify the integrity of the process in the BB84-protocol.
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Kak, S. Quantum key distribution using three basis states. Pramana - J Phys 54, 709–713 (2000). https://doi.org/10.1007/s12043-000-0116-z
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DOI: https://doi.org/10.1007/s12043-000-0116-z